Hi guys so I just bought a used 06 hse with 104k on the clock for only 2k! As excited as I want to be I am thoroughly confused with some of the issues this truck has so for starters the AC does not blow cold it's not blowing hot, just not cold, checked the freon levels both running and off and all was normal according to the gauges although I have read these systems run alot differently than most "normal" cars. I have also read that it is uncommon for the compressors in these trucks to fail and the problem usually lies elsewhere. Also the rear vents are not blowing at all I just checked both fuse panels in the glove box and the rear cargo space I did not find any blown fuses although I only checked by sight because my tester is almost dead I did check the rear relays and did not find anything was inoperable although it still could be faulty. Lastly I am getting several warning lights low coolant, low brake, check fog lights, side lights, tire pressure etc I have already changed the battery because the guy I bought this truck from had a tiny battery In it about half the size of what it needs. At this point I'm thinking the most likely culprit is the alternator as I have read that a diode In the alternator is common to fail and under function I loaned out my multimeter so I can't check at the moment but will In the following days. All I've done for the time being is remove the negative cable while the vehicle is running and turned on every accessory I could think of with no issues I didn't even notice the rpms falling at all. I usually work on carbureted motors and older things with a few exceptions so as you can imagine I am extremely lost any help would be much appreciated!

 

The coolant level sensor is.a common failure item. Make sure it's not low of course.

With all the money you saved get a gap tool.

Clean and check all the chasisc grounds as well

 

Yeah first thing i did was make sure all the fluids are topped off and What is a gap tool and how much do they usually cost? And with as many issues that are happening at once it doesn't strike you as them being related?

 

Congrats on the buy! Love our '06 full size. 100k miles.

 

This is a Gap Tool we offer at Lucky 8

https://www.lucky8llc.com/collection...h-connectivity

 

Since this vehicle uses an Expansion Valve (like most other modern cars), the pressures can be deceiving and most people don't adjust for temperature variations, so its always best to recover the system and weigh just how much came out. This isn't a "DIY" task, you will have to take it to a shop with an A/C Recovery Machine (most shops should).
But just out of curiosity, what were the High and Low side pressures? Pressure readings are still important, just don't give as much indication of charge level as older Orifice Tube models.

I don't think all the issues are related. I think the vehicle was just neglected by an owner that never fixed anything and when enough problems accumulated, they just dumped the vehicle. It is possible to be related and that would be nice, but I doubt that and think you will just have to tackle each problem, one by one. Its not uncommon for vehicles to come in "just for oil services" and over time, we see vehicles slowly degrade because owners don't fix the recommendations that were made.